Effect of rate of nitrogen fertilizer on the above- and below-ground biomass of irrigated bromegrass in southwest Saskatchewan

Leyshon, A. J.

doi:10.4141/cjps91-148

Cited by 17 publications

(8 citation statements)

References 13 publications

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“…Additions of nitrogen to the soil system directly increased plant biomass. Despite the short study period (1 year), the results are compatible with those of Leyshon's (1991) 9-year study, indicating that primary production increases directly with the level of nitrogen added to the soil system. Leyshon irrigated and flooded the area he experimented with, thereby canceling a primary limiting factor-water availability-whereas our study was carried out under natural local conditions.…”

Section: Discussionsupporting

confidence: 77%

“…E Above-ground biomass evaluation was performed by clipping the aboveground vegetation from a randomly chosen 10;10 cm area from each plot. The plant material was oven-dried (603C, 72 h), weighed (Leyshon, 1991) and converted to units of dry weight m\. E Statistical analysis was performed by SAS (ANOVA, Duncan's Multiple Range Test, Coefficient of Correlation) and EXCEL analysis.…”

Section: Co Production Biomassmentioning

confidence: 99%

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Effect of nitrogen amendments on microbial biomass, above-ground biomass and nematode population in the Negev Desert soil

Alon

Steinberger

1999

Journal of Arid Environments

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Section: Discussionsupporting

confidence: 77%

Section: Co Production Biomassmentioning

confidence: 99%

Effect of nitrogen amendments on microbial biomass, above-ground biomass and nematode population in the Negev Desert soil

Alon

Steinberger

1999

Journal of Arid Environments

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“…The reasons for the much greater increase in LFOM from applied N in the 0-5 cm soil layer were as follows. Firstly, bromegrass has a fibrous root system and the majority of roots are in the surface layer of soil (Lorenz 1977;Leyshon 1991) and there is a large increase in root mass production from applied N and P fertilizers (Malhi and Gill 2002).…”

Section: Discussionmentioning

confidence: 99%

Nitrogen Fertilization Effects on Quality of Organic Matter in a Grassland Soil

Malhi

Wang

Schnitzer

et al. 2005

Nutr Cycl Agroecosyst

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Organic matter is important to sustain and improve soil quality and productivity. A field experiment determined the effects of 27 annual spring surface-broadcast applications of ammonium nitrate at 0, 112 and 224 kg N ha À1 year À1 to bromegrass (Bromus inermis Leyss) on light fraction organic matter (LFOM), total amino acids, amino acid C (AAC) and N (AAN), ammonium-N (NH 4 -N) and, total organic matter (TOM) in a thin Black Chernozemic loam soil at Crossfield, Alberta, Canada. The concentration and mass of LFOM, AAC and AAN in the 0-5, 5-10 and 10-15 cm soil layers increased with N rate, with greatest increase in the 0-5 cm layer. The response to N application was much greater for LFOM than for TOM. The changes in soil LFOM, AAC, AAN, NH 4 -N and TOM suggest that N application increases the quantity of light fractions and improves the quality of total organic matter in the soil.

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“…Consequently, the renewal and maintenance of C likely relied more on plant C inputs, mostly through root biomass, than on the direct C input with LHM. The application of LHM increased plant productivity and (Table 3), and thus presumably the plant-derived C input to the soil, although grass root biomass does not always respond as aboveground biomass to the application of N fertilizers (Leyshon 1991;Singh 1999). Reduced C storage in soil receiving 50 m 3 LHM ha -1 year -1 (Fig.…”

Section: Carbonmentioning

confidence: 98%

Differential retention of carbon, nitrogen and phosphorus in grassland soil profiles with long-term manure application

Angers

Chantigny

MacDonald

et al. 2009

Nutr Cycl Agroecosyst

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Liquid hog manure (LHM) is a valuable source of nutrients for farm production. Long-term experimental plots that had received LHM applications of 0, 50, and 100 m 3 ha -1 annually for 20 years were analyzed for total soil C, N and P storage. Applications increased total soil N and P by 1,200 kg N ha -1 and 850 kg P ha -1 at 100 m -3 LHM year -1 , compared to the control treatment. However, C storage did not increase with LHM rates and was lower in the 50 m 3 ha -1 LHM treatment (86 Mg C ha -1 ) than in the 0 or 100 m 3 ha -1 treatments (100 Mg C ha -1 ). In addition to the limited quantities and high decomposability of the C supplied by LHM, it is hypothesized that LHM stimulated the mineralization of both native soil C and fresh root-derived material. This priming effect was particularly apparent in deeper soil horizons where the decomposability of native C may be limited by the supply of fresh C. This study indicates that while LHM can be a significant source of crop nutrients, it has limited capacity for maintaining or increasing soil C.

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Effect of rate of nitrogen fertilizer on the above- and below-ground biomass of irrigated bromegrass in southwest Saskatchewan

Abstract: Leyshon, A. J. 199i. Effect of rate of nitrogen fertilizer on the above-and below-ground biomass ofirrigated bromegrass in southwest Saskatchewan. Can

Cited by 17 publications

References 13 publications

Effect of nitrogen amendments on microbial biomass, above-ground biomass and nematode population in the Negev Desert soil

Effect of nitrogen amendments on microbial biomass, above-ground biomass and nematode population in the Negev Desert soil

Nitrogen Fertilization Effects on Quality of Organic Matter in a Grassland Soil

Differential retention of carbon, nitrogen and phosphorus in grassland soil profiles with long-term manure application

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